Earthquake with magnitude of ML 2.1 on date 11-08-2021 and time 05:59:47 (Italy) in region 4 km N Alseno (PC)

A magnitude ML 2.1 earthquake occured in region: 4 km N Alseno (PC), on

  • 11-08-2021 03:59:47 (UTC)
  • 11-08-2021 05:59:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.936, 9.964 at 28 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Alseno PC 4 4714 4714
Fiorenzuola d'Arda PC 4 15297 20011
Besenzone PC 6 978 20989
Cortemaggiore PC 7 4644 25633
Busseto PR 8 7054 32687
Cadeo PC 9 6118 38805
San Pietro in Cerro PC 10 878 39683
Villanova sull'Arda PC 10 1811 41494
Fidenza PR 11 26770 68264
Castell'Arquato PC 12 4713 72977
Soragna PR 13 4834 77811
Salsomaggiore Terme PR 13 19831 97642
Polesine Zibello PR 14 3232 100874
Carpaneto Piacentino PC 14 7715 108589
Caorso PC 15 4749 113338
Pontenure PC 16 6512 119850
Lugagnano Val d'Arda PC 17 4116 123966
Monticelli d'Ongina PC 17 5302 129268
Fontanellato PR 18 7033 136301
San Giorgio Piacentino PC 18 5792 142093
Castelvetro Piacentino PC 18 5456 147549
Stagno Lombardo CR 18 1554 149103
Vernasca PC 18 2131 151234
Fontevivo PR 19 5597 156831
Gerre de' Caprioli CR 20 1319 158150

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km S of Cremona (71901 inhabitants)
25 Km SE of Piacenza (102191 inhabitants)
32 Km W of Parma (192836 inhabitants)
59 Km W of Reggio nell'Emilia (171345 inhabitants)
69 Km E of Pavia (72576 inhabitants)
70 Km SW of Brescia (196480 inhabitants)
75 Km W of Carpi (70699 inhabitants)
83 Km W of Modena (184973 inhabitants)
85 Km SE of Milano (1345851 inhabitants)
88 Km S of Bergamo (119381 inhabitants)
88 Km SE of Sesto San Giovanni (81608 inhabitants)
90 Km SE of Monza (122671 inhabitants)
91 Km SE of Cinisello Balsamo (75078 inhabitants)
93 Km N of La Spezia (93959 inhabitants)
96 Km N of Carrara (63133 inhabitants)
96 Km E of Vigevano (63310 inhabitants)
98 Km SE of Rho (50434 inhabitants)
98 Km SW of Verona (258765 inhabitants)
100 Km NE of Genova (586655 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire *

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.1 2021-08-11
03:59:47
44.9362 9.9642 28 2021-12-29
11:12:33
Bollettino Sismico Italiano INGV 95948781
Reviewed
Rev100
ML 2.0 2021-08-11
03:59:47
44.9673 9.8858 29 2021-08-11
12:08:20
Sala Sismica INGV-Roma 93964951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-11 03:59:47 ± 0.09
Latitude 44.9362 ± 0.0063
Longitude 9.9642 ± 0.0140
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95948781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1019
Semi-minor axis of confidence ellipse (meter) 585
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.19605
Epicentral distance of station farthest from the epicenter (degree) 1.74468
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 63
Type of magnitude ML
Reference to an origin 95948781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-18 17:15:49

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 93964951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-11 12:08:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
ST.CARE.EHZ. 2021-08-11T04:00:35.10 0.6 undecidable manual S 19 1.5729 54 1.1 30
ST.GAGG.HHZ. 2021-08-11T04:00:28.90 0.6 undecidable manual S 31 1.3418 54 0.44 44
ST.DOSS.HHZ. 2021-08-11T04:00:27.32 0.6 undecidable manual S 42 1.2761 54 0.42 45
SI.LUSI.HHZ. 2021-08-11T04:00:25.90 0.3 undecidable manual S 34 1.2321 54 0.07 73
IV.MABI.HHZ. 2021-08-11T04:00:24.89 0.6 undecidable manual S 19 1.1826 54 0.23 48
ST.RONC.EHZ. 2021-08-11T04:00:23.88 0.6 undecidable manual S 24 1.1412 54 0.22 48
OX.MARN.HHZ. 2021-08-11T04:00:23.24 0.3 undecidable manual S 51 1.1224 54 0.04 76
ST.VARA.EHZ. 2021-08-11T04:00:22.89 0.6 undecidable manual S 36 1.1044 54 0.11 50
IV.ROVR.HHZ. 2021-08-11T04:00:21.78 0.6 undecidable manual S 47 1.054 99 0.27 49
IV.MAGA.HHZ. 2021-08-11T04:00:18.97 0.6 undecidable manual S 29 0.9596 100 0.22 50
IV.ZEN8.EHZ. 2021-08-11T04:00:16.91 0.6 undecidable manual S 37 0.8849 101 0.34 50
IV.MDI.HHZ. 2021-08-11T04:00:16.07 0.6 undecidable manual S 348 0.8508 101 0.48 48
ST.ZIAN.EHZ. 2021-08-11T04:00:16.88 0.3 undecidable manual P 39 1.7447 54 0.17 56
IV.ZONE.HHZ. 2021-08-11T04:00:15.98 0.6 undecidable manual S 7 0.8337 102 0.89 41
IV.CTI.HHZ. 2021-08-11T04:00:14.63 0.3 undecidable manual P 46 1.6215 54 -0.38 57
IV.SALO.HHZ. 2021-08-11T04:00:14.94 0.3 undecidable manual S 30 0.7878 102 1.2 54
ST.CARE.EHZ. 2021-08-11T04:00:14.09 0.6 undecidable manual P 19 1.5729 54 -0.25 41
IV.SGAL.EHZ. 2021-08-11T04:00:10.04 0.6 undecidable manual S 21 0.6727 105 -0.4 52
IV.PII.HHZ. 2021-08-11T04:00:10.82 0.6 undecidable manual P 162 1.2779 54 0.56 44
ST.GAGG.HHZ. 2021-08-11T04:00:10.82 0.3 undecidable manual P 31 1.3418 54 -0.32 67
ST.DOSS.HHZ. 2021-08-11T04:00:09.80 0.3 undecidable manual P 42 1.2761 54 -0.44 67
GU.MAIM.HHZ. 2021-08-11T04:00:09.35 0.6 undecidable manual P 160 1.0891 54 1.69 26
SI.LUSI.HHZ. 2021-08-11T04:00:09.03 0.3 undecidable manual P 34 1.2321 54 -0.59 64
GU.GORR.HHZ. 2021-08-11T04:00:08.21 0.6 undecidable manual S 236 0.5792 107 0.44 52
ST.RONC.EHZ. 2021-08-11T04:00:08.18 0.3 undecidable manual P 24 1.1412 54 -0.19 73
GU.PCP.HHZ. 2021-08-11T04:00:08.95 0.6 undecidable manual P 249 1.0819 54 1.4 31
IV.MABI.HHZ. 2021-08-11T04:00:08.70 0.3 undecidable manual P 19 1.1826 54 -0.24 71
OX.MARN.HHZ. 2021-08-11T04:00:07.48 0.3 undecidable manual P 51 1.1224 54 -0.62 65
GU.POPM.HHZ. 2021-08-11T04:00:07.76 0.6 undecidable manual P 147 1.0549 99 0.62 45
ST.VARA.EHZ. 2021-08-11T04:00:07.46 0.3 undecidable manual P 36 1.1044 54 -0.4 70
IV.ROVR.HHZ. 2021-08-11T04:00:06.64 0.1 undecidable manual P 47 1.054 99 -0.49 93
GU.CARD.HHZ. 2021-08-11T04:00:06.15 0.6 undecidable manual P 158 0.9812 100 0.25 50
IV.MAGA.HHZ. 2021-08-11T04:00:05.14 0.1 undecidable manual P 29 0.9596 100 -0.39 97
GU.GRAM.HHZ. 2021-08-11T04:00:04.65 0.6 undecidable manual S 171 0.4515 113 0.44 54
IV.MERA.HNE. 2021-08-11T04:00:04.51 0.3 undecidable manual P 334 0.8562 101 0.72 66
GU.SARM.EHN. 2021-08-11T04:00:03.33 0.3 undecidable manual P 157 0.813 102 0.25 78
IV.ZONE.HHZ. 2021-08-11T04:00:03.37 0.3 undecidable manual P 7 0.8337 102 -0.05 81
IV.ZEN8.EHZ. 2021-08-11T04:00:03.64 0.3 undecidable manual P 37 0.8849 101 -0.64 69
IV.BOB.HHN. 2021-08-11T04:00:03.10 0.6 undecidable manual S 246 0.4029 116 0.2 56
IV.MDI.HHZ. 2021-08-11T04:00:03.64 0.3 undecidable manual P 348 0.8508 101 -0.07 80
GU.GSCL.HHN. 2021-08-11T04:00:02.28 0.3 undecidable manual P 143 0.7338 103 0.53 75
IV.SALO.HHZ. 2021-08-11T04:00:02.64 0.6 undecidable manual P 30 0.7878 102 0 55
IV.MSSA.HHZ. 2021-08-11T04:00:01.56 0.6 undecidable manual P 207 0.6961 104 0.44 51
IV.SGAL.EHZ. 2021-08-11T04:00:00.33 0.6 undecidable manual P 21 0.6727 105 -0.4 52
GU.GORR.HHZ. 2021-08-11T03:59:58.53 0.1 undecidable manual P 236 0.5792 107 -0.66 97
IV.PCN.EHZ. 2021-08-11T03:59:58.28 0.6 undecidable manual S 300 0.1961 138 0.36 56
GU.GRAM.HHZ. 2021-08-11T03:59:56.33 0.3 undecidable manual P 171 0.4515 113 -0.81 70
IV.BOB.HHN. 2021-08-11T03:59:55.79 0.3 undecidable manual P 246 0.4029 116 -0.59 78
IV.PCN.EHZ. 2021-08-11T03:59:52.70 0.1 undecidable manual P 300 0.1961 138 -0.81 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGAL.EHE. ML:1.9 0.000111 0.08 AML other m 2021-08-11T04:00:14.44
IV.SGAL.EHN. ML:1.7 7.092998E-5 0.2176 AML other m 2021-08-11T04:00:14.92
IV.ZONE.HNN. ML:2.1 0.00012746235 1.2992 AML other m 2021-08-11T04:00:16.74
IV.SALO.HHE. ML:1.9 8.57E-5 0.28 AML other m 2021-08-11T04:00:16.71
IV.MDI.HHN. ML:2.3 0.000219 0.26 AML other m 2021-08-11T04:00:17.79
IV.ZONE.HHE. ML:2.3 0.0002104412 0.1632 AML other m 2021-08-11T04:00:17.87
IV.ZEN8.EHN. ML:1.6 3.928792E-5 0.2176 AML other m 2021-08-11T04:00:17.78
IV.ZEN8.HNN. ML:3.2 0.001734121 0.7584 AML other m 2021-08-11T04:00:17.95
IV.ZEN8.HNE. ML:3.4 0.00254 1.24 AML other m 2021-08-11T04:00:17.96
IV.ZEN8.EHE. ML:1.6 3.6825045E-5 0.2624 AML other m 2021-08-11T04:00:18.02
IV.ZONE.HHN. ML:2.4 0.0002665 0.14 AML other m 2021-08-11T04:00:18.14
IV.MDI.HHE. ML:2.1 0.00012049438 0.3008 AML other m 2021-08-11T04:00:18.89
IV.SALO.HHN. ML:1.9 8.7242375E-5 0.4416 AML other m 2021-08-11T04:00:18.98
IV.SALO.HNN. ML:2.1 0.00014383035 0.4608 AML other m 2021-08-11T04:00:19.20
IV.ZONE.HNE. ML:1.6 4.5819985E-5 0.5376 AML other m 2021-08-11T04:00:19.55
IV.MBAL.HNE. ML:2.5 0.00026212365 0.7008 AML other m 2021-08-11T04:00:19.83
IV.SALO.HNE. ML:2 0.00011037996 0.56 AML other m 2021-08-11T04:00:20.17
IV.MSSA.HHN. ML:1.5 4.73E-5 0.26 AML other m 2021-08-11T04:00:20.17
IV.MSSA.HHE. ML:1.6 5.678169E-5 0.1024 AML other m 2021-08-11T04:00:20.47
IV.MAGA.HHN. ML:2.4 0.000193 0.32 AML other m 2021-08-11T04:00:21.23
IV.MAGA.HHE. ML:2.6 0.0003085 0.32 AML other m 2021-08-11T04:00:21.65
IV.ROVR.HNN. ML:2.2 0.0001219883 0.7104 AML other m 2021-08-11T04:00:24.23
IV.ROVR.HHE. ML:2 7.66E-5 1 AML other m 2021-08-11T04:00:24.87
IV.ROVR.HHN. ML:2.4 0.0001705 0.2 AML other m 2021-08-11T04:00:25.06
ST.VARA.HNE. ML:2.2 9.841136E-5 0.16 AML other m 2021-08-11T04:00:25.50
OX.MARN.HHN. ML:2.2 0.00010525 0.94 AML other m 2021-08-11T04:00:25.64
OX.MARN.HNN. ML:2.1 8.9944475E-5 0.1792 AML other m 2021-08-11T04:00:25.64
ST.RONC.HNE. ML:2.7 0.00034974375 0.2016 AML other m 2021-08-11T04:00:25.76
OX.MARN.HHE. ML:2.2 9.670317E-5 0.3424 AML other m 2021-08-11T04:00:25.67
IV.MABI.HHE. ML:2.1 7.465E-5 0.36 AML other m 2021-08-11T04:00:25.92
ST.VARA.HNN. ML:2.5 0.00022904103 0.3424 AML other m 2021-08-11T04:00:26.15
ST.RONC.EHE. ML:2.6 0.00026810485 0.3776 AML other m 2021-08-11T04:00:26.34
CH.MUGIO.HHN. ML:1.6 2.45E-5 0.42 AML other m 2021-08-11T04:00:26.22
IV.MABI.HHN. ML:2 5.5633575E-5 0.32 AML other m 2021-08-11T04:00:26.32
ST.VARA.EHE. ML:2.6 0.00025070995 0.3392 AML other m 2021-08-11T04:00:26.16
GU.CARD.HHE. ML:1.6 3.4916625E-5 0.32 AML other m 2021-08-11T04:00:26.78
ST.RONC.EHN. ML:2.7 0.000319 0.18 AML other m 2021-08-11T04:00:26.80
ST.VARA.EHN. ML:1.3 1.740295E-5 4.0416 AML other m 2021-08-11T04:00:27.10
GU.CARD.HHN. ML:1.6 3.15E-5 1.36 AML other m 2021-08-11T04:00:27.87
SI.LUSI.HHN. ML:2.8 0.000358 0.3 AML other m 2021-08-11T04:00:27.65
SI.LUSI.HHE. ML:2.4 0.0001355 0.14 AML other m 2021-08-11T04:00:28.29
CH.MUGIO.HHE. ML:1.6 2.255E-5 0.22 AML other m 2021-08-11T04:00:28.65
GU.POPM.HHN. ML:1.8 4.695E-5 0.8 AML other m 2021-08-11T04:00:29.39
GU.MAIM.HHN. ML:1.4 1.926556E-5 0.4992 AML other m 2021-08-11T04:00:29.42
GU.MAIM.HHE. ML:1.2 1.2132158E-5 0.7424 AML other m 2021-08-11T04:00:30.02
ST.GAGG.HHN. ML:1.9 4.05E-5 0.34 AML other m 2021-08-11T04:00:30.06
IV.ROVR.HNE. ML:2.2 0.00012395686 0.9088 AML other m 2021-08-11T04:00:30.47
GU.POPM.HHE. ML:1.6 2.845925E-5 0.3232 AML other m 2021-08-11T04:00:30.96
ST.GAGG.HHE. ML:2.2 8.68E-5 1.76 AML other m 2021-08-11T04:00:30.07
ST.GAGG.HNN. ML:2.3 9.2967635E-5 0.3616 AML other m 2021-08-11T04:00:31.07
IV.PII.HHE. ML:1.7 2.5035575E-5 0.2976 AML other m 2021-08-11T04:00:31.53
ST.GAGG.HNE. ML:2.2 8.611098E-5 0.6176 AML other m 2021-08-11T04:00:32.32
ST.DOSS.HHN. ML:2 5.885E-5 0.54 AML other m 2021-08-11T04:00:33.64
ST.DOSS.HHE. ML:2 5.719452E-5 0.4384 AML other m 2021-08-11T04:00:33.77
IV.PII.HHN. ML:1.6 1.9564305E-5 0.2208 AML other m 2021-08-11T04:00:34.42
ST.CARE.EHN. ML:2 3.7731845E-5 0.32 AML other m 2021-08-11T04:00:37.08
ST.CARE.EHE. ML:1.9 3.1346815E-5 0.56 AML other m 2021-08-11T04:00:38.10
GU.CANO.HHN. ML:1.5 1.74E-5 0.98 AML other m 2021-08-11T04:00:38.16
ST.DOSS.HNE. ML:2.2 8.8627715E-5 1.2576 AML other m 2021-08-11T04:00:39.49
IV.CTI.HHE. ML:2.1 5.17E-5 0.18 AML other m 2021-08-11T04:00:39.90
IV.CTI.HHN. ML:2.2 5.495E-5 0.74 AML other m 2021-08-11T04:00:39.90
OX.MARN.HNE. ML:3.3 0.001481082 1.8976 AML other m 2021-08-11T04:00:45.87
GU.CANO.HHE. ML:2 3.785E-5 1.16 AML other m 2021-08-11T04:00:48.12
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download